US4085237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacturing pressure sensitive copying sheet
Assignee: New Oji Paper Co Ltd
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Filing: 1975-09-15
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Granted: 1978-04-18
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Expires: 1995-09-15
Abstract
Abstract The continuously fed paper sheet is subjected to the successive steps of coating an acceptor composition at its one side, drying, calendering with a calender comprising a metal roll and an elastic roll having a Shore hardness within the range of 65 to 90, further coating a color former composition on the other side and further drying. The continuously fed paper sheet may be subjected to a cylinder ironing treatment between the first drying step and the calendering step.
Inventors
- 👤 Takajiro Kawakami
- 👤 Minesilo Mizuno
- 👤 Akira Okushi
- 👤 Michio Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:03
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/52; D21H23/56; B; B41; B41M; B41M5/00; B41M5/124; D21H5/00; D21H5/0005; D21H5/0025; D21H5/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
In a method for manufacturing a pressure sensitive copying sheet having an acceptor coating on one side and a color former coating on the opposite side, the steps, in the sequence set forth, of coating an acceptor composition on one side of a continuously fed paper sheet, drying the paper sheet coated with said acceptor composition, cylinder ironing said paper sheet to remove wrinkles, calendering the dried sheet with a calender comprising at least one pair of rolls, one of said pair of rolls being a metal roll and the other being an elastic roll having a Shore hardness within the range of 65 to 90, coating a color former composition on the other side of said paper sheet, drying the paper sheet coated with said color former composition.
Claim 2
Dependent Claim
129 words
In a method for manufacturing a pressure sensitive copying sheet having an acceptor coating on one side and a color former coating on the opposite side, the steps, in the sequence set forth, of coating an acceptor composition on one side of a continuously fed paper sheet, drying the paper sheet coated with said acceptor composition, cylinder ironing said paper sheet to remove wrinkles, calendering the dried sheet with a calender comprising at least one pair of rolls, one of said pair of rolls being a metal roll and the other being an elastic roll having a Shore hardness within the range of 65 to 90, coating a color former composition on the other side of said paper sheet, drying the paper sheet coated with said color former composition.
Claim 3
Dependent Claim
30 words
A method for manufacturing a pressure sensitive copying sheet as defined in claim 1, in which said elastic roll has a Shore hardness within the range of 78 to 85.
Claim 4
Dependent Claim
25 words
A method for manufacturing a pressure sensitive copying sheet as defined in claim 1, still further including cylinder cooling step after said cylinder ironing step.
Claim 5
Dependent Claim
30 words
A method for manufacturing a pressure sensitive copying sheet as defined in claim 3, in which said elastic roll has a Shore hardness within the range of 78 to 85.
Claim 6
Dependent Claim
199 words
Apparatus for manufacturing a pressure sensitive copying sheet having an acceptor coating on one side and a color former coating on the opposite side which comprises a successive arrangement of: a. a first coater for coating an acceptor composition on one side of a continuously fed paper sheet, b. a first dryer for drying the paper sheet coated with said acceptor composition, c. cylinder ironing means to remove wrinkles from the paper sheet, said cylinder ironing means comprising a rotating cylindrical drum with a heater and an endless belt which is pressed at a stretched portion thereof along the peripheral direction of said drum toward said drum so that said endless belt may be moved along with said rotating drum, d. a calender for calendering the dried sheet, said calender comprising at least one pair of rolls, one of said pair of rolls being a metal roll and the other being an elastic roll having a Shore hardness within the range of 65 to 90, e. a second coater for coating a color former composition on the other side of said paper sheet, and f. a second dryer for drying the paper sheet coated with said color former composition.
Claim 7
Dependent Claim
199 words
Apparatus for manufacturing a pressure sensitive copying sheet having an acceptor coating on one side and a color former coating on the opposite side which comprises a successive arrangement of: a. a first coater for coating an acceptor composition on one side of a continuously fed paper sheet, b. a first dryer for drying the paper sheet coated with said acceptor composition, c. cylinder ironing means to remove wrinkles from the paper sheet, said cylinder ironing means comprising a rotating cylindrical drum with a heater and an endless belt which is pressed at a stretched portion thereof along the peripheral direction of said drum toward said drum so that said endless belt may be moved along with said rotating drum, d. a calender for calendering the dried sheet, said calender comprising at least one pair of rolls, one of said pair of rolls being a metal roll and the other being an elastic roll having a Shore hardness within the range of 65 to 90, e. a second coater for coating a color former composition on the other side of said paper sheet, and f. a second dryer for drying the paper sheet coated with said color former composition.
Claim 8
Dependent Claim
39 words
Apparatus for manufacturing a pressure sensitive copying sheet as defined in claim 5, still further including cylinder cooling means at a position after said cylinder ironing means, said cylinder cooling means comprising a rotating cylindrical drum with cooling means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |